<template>
  <div>
    <div v-show="eidet">全场清仓，全部5折</div>


     <ul>
        <li v-for="item in goods" :key="item.name">
            <div>{{ item.name }}</div>
            <div>{{ item.price * item.discount}}</div>
            <div>折扣：{{ item.discount * 100 }}%</div>
        </li>
     </ul>
     <button @click="sales">点击开启促销活动</button>
   </div>
</template>
 
<script>
export default {

  data() {
    return {
        eidet:false,
        goods:[
            {
                name:'mac电脑',
                price:'15000',
                discount:1
            },
            {
                name:'百事可乐',
                price:'3',
                discount:1
            },
            {
                name:'保温杯',
                price:'99',
                discount:1
            },
            {
                name:'保暖手套',
                price:'130',
                discount:1
            },
        ]
    };
  },
  computed: {},

  methods: {
    sales() {
      this.eidet = true 
      this.goods.forEach(item => {
         item.discount = 0.5 
      })
    }
  }
};
</script>

<style scoped>
ul {
    margin: 0;
    padding: 0;
}

li {
    list-style: none;
    width: 200px;
    height: 80px;
    padding:10px 0 0 0 ;
    border: 2px solid #333;
}
</style>